### All Common Core: 8th Grade Math Resources

## Example Questions

### Example Question #1 : Scatter Plots

What would be the most accurate line of best fit for this scatter plot?

**Possible Answers:**

**Correct answer:**

This data is quadratic rather than linear - it increases much more sharply than the line . It is also a positive correlation, so the equation should be positive. It is not because the data starts very near the origin .

### Example Question #1 : Fit A Straight Line In A Scatter Plot That Has Linear Association: Ccss.Math.Content.8.Sp.A.2

Select the scatter plot that shows the most accurate line of best fit.

**Possible Answers:**

**Correct answer:**

A line of best fit is a line on a graph that follows the general direction of the data points displayed on the graph. The line of best fit should be as close as possible to all of the data points graphed. There should be just as many dots above the line as below the line. It displays where the two variables are correlated to one another.

Based on the options, the graph below has the line of best fit because it is close to all of the data points, follows the same direction as the points, and there are just as many data points below the line as above the line.

### Example Question #3 : Fit A Straight Line In A Scatter Plot That Has Linear Association: Ccss.Math.Content.8.Sp.A.2

Select the scatter plot that shows the most accurate line of best fit.

**Possible Answers:**

**Correct answer:**

A line of best fit is a line on a graph that follows the general direction of the data points displayed on the graph. The line of best fit should be as close as possible to all of the data points graphed. There should be just as many dots above the line as below the line. It displays where the two variables are correlated to one another.

Based on the options, the graph below has the line of best fit because it is close to all of the data points, follows the same direction as the points, and there are just as many data points below the line as above the line.

### Example Question #4 : Fit A Straight Line In A Scatter Plot That Has Linear Association: Ccss.Math.Content.8.Sp.A.2

Select the scatter plot that shows the most accurate line of best fit.

**Possible Answers:**

**Correct answer:**

A line of best fit is a line on a graph that follows the general direction of the data points displayed on the graph. The line of best fit should be as close as possible to all of the data points graphed. There should be just as many dots above the line as below the line. It displays where the two variables are correlated to one another.

Based on the options, the graph below has the line of best fit because it is close to all of the data points, follows the same direction as the points, and there are just as many data points below the line as above the line.

### Example Question #5 : Fit A Straight Line In A Scatter Plot That Has Linear Association: Ccss.Math.Content.8.Sp.A.2

Select the scatter plot that shows the most accurate line of best fit.

**Possible Answers:**

**Correct answer:**

### Example Question #1 : Fit A Straight Line In A Scatter Plot That Has Linear Association: Ccss.Math.Content.8.Sp.A.2

Select the scatter plot that shows the most accurate line of best fit.

**Possible Answers:**

**Correct answer:**

### Example Question #7 : Fit A Straight Line In A Scatter Plot That Has Linear Association: Ccss.Math.Content.8.Sp.A.2

Select the scatter plot that shows the most accurate line of best fit.

**Possible Answers:**

**Correct answer:**

### Example Question #8 : Fit A Straight Line In A Scatter Plot That Has Linear Association: Ccss.Math.Content.8.Sp.A.2

Select the scatter plot that shows the most accurate line of best fit.

**Possible Answers:**

**Correct answer:**

### Example Question #9 : Fit A Straight Line In A Scatter Plot That Has Linear Association: Ccss.Math.Content.8.Sp.A.2

Select the scatter plot that shows the most accurate line of best fit.

**Possible Answers:**

**Correct answer:**

Based on the options, the graph below has the line of best fit because it is close to all of the data points, follows the same direction as the points, and there are just as many data points below the line as above the line

### Example Question #10 : Fit A Straight Line In A Scatter Plot That Has Linear Association: Ccss.Math.Content.8.Sp.A.2

Select the scatter plot that shows the most accurate line of best fit.

**Possible Answers:**

**Correct answer:**

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